TypeError: Invalid http_client argument. Unexpected keyword argument proxies

[marianobianchi]

I'm having an issue when trying to initialize the Retell client in python. This is a simple way to reproduce the error:

In [1]: from retell import Retell

In [2]: Retell(api_key=settings.RETELL_API_KEY)
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
Cell In[2], line 1
----> 1 Retell(api_key=settings.RETELL_API_KEY)

File ~/.local/lib/python3.12/site-packages/retell/_client.py:94, in Retell.__init__(self, api_key, base_url, timeout, max_retries, default_headers, default_query, http_client, _strict_response_validation)
     91 if base_url is None:
     92     base_url = f"https://api.retellai.com"
---> 94 super().__init__(
     95     version=__version__,
     96     base_url=base_url,
     97     max_retries=max_retries,
     98     timeout=timeout,
     99     http_client=http_client,
    100     custom_headers=default_headers,
    101     custom_query=default_query,
    102     _strict_response_validation=_strict_response_validation,
    103 )
    105 self.call = resources.CallResource(self)
    106 self.phone_number = resources.PhoneNumberResource(self)

File ~/.local/lib/python3.12/site-packages/retell/_base_client.py:855, in SyncAPIClient.__init__(self, version, base_url, max_retries, timeout, transport, proxies, limits, http_client, custom_headers, custom_query, _strict_response_validation)
    838     raise TypeError(
    839         f"Invalid `http_client` argument; Expected an instance of `httpx.Client` but got {type(http_client)}"
    840     )
    842 super().__init__(
    843     version=version,
    844     limits=limits,
   (...)
    853     _strict_response_validation=_strict_response_validation,
    854 )
--> 855 self._client = http_client or SyncHttpxClientWrapper(
    856     base_url=base_url,
    857     # cast to a valid type because mypy doesn't understand our type narrowing
    858     timeout=cast(Timeout, timeout),
    859     proxies=proxies,
    860     transport=transport,
    861     limits=limits,
    862     follow_redirects=True,
    863 )

File ~/.local/lib/python3.12/site-packages/retell/_base_client.py:753, in _DefaultHttpxClient.__init__(self, **kwargs)
    751 kwargs.setdefault("limits", DEFAULT_CONNECTION_LIMITS)
    752 kwargs.setdefault("follow_redirects", True)
--> 753 super().__init__(**kwargs)

TypeError: Client.__init__() got an unexpected keyword argument 'proxies'

[marianobianchi]

Apparently the new httpx version has some incompatibility. I was able to fix the issue by adding this to my dependencies:
httpx==0.27.2

[dgellow]

Hi @marianobianchi. A patch has been pushed to the next release #203.

The diff is #215.

Setting a dependency constraints to httpx==0.27.x as you did is also an option.

[dgellow]

@marianobianchi a version 4.9.0 has been published to PyPi, could you try to upgrade and confirm that fixes the issue for you?